Appeal — Agreements, decisions and concerted practices — European markets in tin stabilisers and in ESBO/esters heat stabilisers — Price fixing, market allocation and exchange of commercially sensitive information — Whether the unlawful conduct of the subsidiaries may be attributed to the parent company — Regulation (EC) No 1/2003 — Article 25(1) — Limitation period for the imposition of penalties on subsidiaries — Effects on the legal position of the parent company